From 2306d1534450e29bdf85581e0458c07806fb0228 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Manuel=20P=C3=A9gouri=C3=A9-Gonnard?= <mpg@elzevir.fr>
Date: Wed, 17 Jul 2019 12:36:53 +0200
Subject: [PATCH] Declare new config.h option MBEDTLS_SHA512_SMALLER

---
 include/mbedtls/config.h     | 10 ++++++++++
 library/version_features.c   |  3 +++
 programs/test/query_config.c |  8 ++++++++
 3 files changed, 21 insertions(+)

diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 56ad01c40..f1b6605b2 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -982,6 +982,16 @@
  */
 //#define MBEDTLS_SHA256_SMALLER
 
+/**
+ * \def MBEDTLS_SHA512_SMALLER
+ *
+ * Enable an implementation of SHA-512 that has lower ROM footprint but also
+ * lower performance.
+ *
+ * Uncomment to enable the smaller implementation of SHA512.
+ */
+//#define MBEDTLS_SHA512_SMALLER
+
 /**
  * \def MBEDTLS_THREADING_ALT
  *
diff --git a/library/version_features.c b/library/version_features.c
index 4f1da6aea..7feeee419 100644
--- a/library/version_features.c
+++ b/library/version_features.c
@@ -405,6 +405,9 @@ static const char *features[] = {
 #if defined(MBEDTLS_SHA256_SMALLER)
     "MBEDTLS_SHA256_SMALLER",
 #endif /* MBEDTLS_SHA256_SMALLER */
+#if defined(MBEDTLS_SHA512_SMALLER)
+    "MBEDTLS_SHA512_SMALLER",
+#endif /* MBEDTLS_SHA512_SMALLER */
 #if defined(MBEDTLS_THREADING_ALT)
     "MBEDTLS_THREADING_ALT",
 #endif /* MBEDTLS_THREADING_ALT */
diff --git a/programs/test/query_config.c b/programs/test/query_config.c
index fc25353fa..10634306a 100644
--- a/programs/test/query_config.c
+++ b/programs/test/query_config.c
@@ -1109,6 +1109,14 @@ int query_config( const char *config )
     }
 #endif /* MBEDTLS_SHA256_SMALLER */
 
+#if defined(MBEDTLS_SHA512_SMALLER)
+    if( strcmp( "MBEDTLS_SHA512_SMALLER", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( MBEDTLS_SHA512_SMALLER );
+        return( 0 );
+    }
+#endif /* MBEDTLS_SHA512_SMALLER */
+
 #if defined(MBEDTLS_THREADING_ALT)
     if( strcmp( "MBEDTLS_THREADING_ALT", config ) == 0 )
     {